Vance Jaqua wrote:

 Both the IVO and the Warp standard blades do not have
enough twist to set near true helical pitch near the
hub that means that the tip pitch might be the 70 or
so inches you need  for a fast plane, but near the hub
it might be down around 40 and running negative at the
higher speed  for a loss. This is aggravated by the
tendency to put too much ratio in the redrive which in
some cases puts the pitch requirement up to the 90's.
I have not seen the "deep ptch" Ivo - it may adress
the problem - but thos big blades, flexible enough to
be twisted with that little rod, and hanging on two
bolts
scare me! Vance

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